An Integrated Workflow to Mitigate Drilling Vibrations and Increase Daily Footage
- J. R. Bailey (ExxonMobil Development Co.) | P. E. Pastusek (ExxonMobil Development Co.) | H. Al Junaibi (National Drilling Co.) | M. Al Awadhi (National Drilling Co.) | Y. Al Katheeri (Zakum Development Co.) | M. R. Niznik (Zakum Development Co.) | K. S. Akyabi (Zakum Development Co.) | C. G. Page (Exxon Neftegas Ltd.)
- Document ID
- Society of Petroleum Engineers
- Abu Dhabi International Petroleum Exhibition & Conference, 7-10 November, Abu Dhabi, UAE
- Publication Date
- Document Type
- Conference Paper
- 2016. Society of Petroleum Engineers
- 1.1 Well Planning, 1.10 Drilling Equipment, 1.6 Drilling Operations, 6 Health, Safety, Security, Environment and Social Responsibility, 1.13 Drilling Automation, 1.10 Drilling Equipment, 1.4 Drillstring Design, 1.4.1 BHA Design, 6.1.5 Human Resources, Competence and Training, 1.6.1 Drill String Components and Drilling Tools (tubulars, jars, subs, stabilisers, reamers, etc), 1.6.6 Directional Drilling, 6.1 HSSE & Social Responsibility Management
- Drilling Efficiency, Increase Daily Footage, Drilling Vibrations, Integrated Workflow, Vibration Mitigation
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A workflow that combines optimization of the drill string and bottomhole assembly (BHA) design during well planning and then applies advanced surveillance tools to a well-trained drilling crew yields reduced vibrations, higher drilling rates, and less trouble cost. This methodology is based on the premise that an efficient drilling operation requires optimized tool designs, advanced diagnostics using real-time drilling parameters, and onsite training of efficient drilling practices and the proper use of rig control systems.
The use of efficient modeling procedures to compare alternative drill string and BHA designs provides valuable insights into the string and tool selection process. A method to select the optimal stabilizer contact locations for the BHA tools helps to avoid lateral vibration dysfunctions, and a torsional vibration model can quickly evaluate the resistance of alternative string designs to harmful torsional stick-slip vibrations. Provided the proper hardware, a well-trained driller can be more effective with automated drilling performance evaluation tools that provide real-time drilling parameter recommendations based on optimizing Mechanical Specific Energy (MSE), torsional vibration stick-slip severity, and Rate of Penetration (ROP).
BHA lateral vibrations modeling is field-proven and has been applied globally. One case study will show an application of the model to select a BHA design with specified rotary speed sweet spot. The torsional vibration model can be used in both a design process and in a real-time surveillance mode. In one case study, stick-slip vibrations were too severe to drill ahead with a tapered string design that was selected to lower the equivalent circulating density (ECD). The model helped identify the increase in stick-slip resistance obtained by substituting a portion of the smaller pipe with larger pipe. A real-time surveillance tool provides automated drilling performance analysis and makes recommendations to the driller on bit weight and rotary speed. The recommendations are based on the torsional vibration model results, operating in a surveillance mode, and the MSE and ROP. Rig control systems impact drilling dynamics and efficiency in ways that are not well understood by most drillers, and training on awareness and mitigation of these effects can avoid severe dysfunctions.
|File Size||5 MB||Number of Pages||33|
Ertas, D, Bailey, JR, Wang, L, and Pastusek, PE, "Drillstring Mechanics Model for Surveillance, Root Cause Analysis, and Mitigation of Torsional and Axial Vibrations," SPE/IADC 163420-MS presented at the SPE/IADC Drilling Conference, Amsterdam, The Netherlands, 5-7 March, 2013. Subsequently published in SPE Drilling & Completion, Dec. 2014.
Valenta, MA, Walker, MW, Pastusek, PE, Bailey, JR, Elks, WC, Lewis, SB, and Mitchell, ND, "Maximizing Capital Efficiency by Expanding the Limiter Redesign Process to Flat Time Operations," SPE-170751-MS presented at the SPE Annual Technical Conference and Exhibition, Amsterdam, The Netherlands, 27–29 October 2014.